重新说明 php 的 feof() 是如何工作的
Reclarification of how feof() of php work
我已阅读the comment about feof() on PHP manual, and another answer on Whosebug。
所以我明白使用 feof() 并不意味着使用 'crystal ball' 神奇地知道流中是否有更多字符或行，如上面第二个 link 所述.相反，它是一个指示输入操作是否失败的测试（在这种情况下，我只关心PHP的fgetc()的输入操作） .所以读取的最后一个字符仍然可以。 AND THEN，while(!feof($file_you_read_from)) 的 feof() 仍将是 false，因为最后一个 fgetc() 仍然成功并且 在 又一个循环，其中 fgetc() 尝试读取并失败，只有到那时 feof() 才会被设置为 true。我对么？我是不是误会了什么？
feof in PHP 和 C 一样工作。
如果是 false 则检查最后一个操作，否则 returns 缓存值。
Checks whether the end-of-File indicator associated with stream is
set, returning a value different from zero if it is.
This indicator is generally set by a previous operation on the stream
that attempted to read at or past the end-of-file.
Notice that stream's internal position indicator may point to the
end-of-file for the next operation, but still, the end-of-file
indicator may not be set until an operation attempts to read at that
point.
This indicator is cleared by a call to clearerr, rewind, fseek,
fsetpos or freopen. Although if the position indicator is not
repositioned by such a call, the next i/o operation is likely to set
the indicator again.
我已阅读the comment about feof() on PHP manual,
所以我明白使用 feof() 并不意味着使用 'crystal ball' 神奇地知道流中是否有更多字符或行，如上面第二个 link 所述.相反，它是一个指示输入操作是否失败的测试（在这种情况下，我只关心PHP的fgetc()的输入操作） .所以读取的最后一个字符仍然可以。 AND THEN，while(!feof($file_you_read_from)) 的 feof() 仍将是 false，因为最后一个 fgetc() 仍然成功并且 在 又一个循环，其中 fgetc() 尝试读取并失败，只有到那时 feof() 才会被设置为 true。我对么？我是不是误会了什么？
feof in PHP 和 C 一样工作。
如果是 false 则检查最后一个操作，否则 returns 缓存值。
Checks whether the end-of-File indicator associated with stream is set, returning a value different from zero if it is.
This indicator is generally set by a previous operation on the stream that attempted to read at or past the end-of-file.
Notice that stream's internal position indicator may point to the end-of-file for the next operation, but still, the end-of-file indicator may not be set until an operation attempts to read at that point.
This indicator is cleared by a call to clearerr, rewind, fseek, fsetpos or freopen. Although if the position indicator is not repositioned by such a call, the next i/o operation is likely to set the indicator again.